Formal:
* Favor: Implies a positive impression or approval.
* Regular: Focuses on fulfilling obligations.
* Satisfactory: Meets expected standards.
* Acceptable: Meets minimum requirements.
* Approved: Officially accepted.
* Certified: Officially recognized as meeting criteria.
* Credentialed: Possessing the necessary qualifications.
Informal:
* In good shape: Implies everything is fine and working well.
* In good graces: Signifies being on good terms with someone.
* A good book: Indicates a positive reputation.
* In the clear: Suggests no issues or problems.
* Up to date: Implies fulfilling obligations and being current.
* On the right side of the law: Highlights legal compliance.
The best synonym will depend on the specific context of the situation.